JPH0448767Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention heats the liquid in the inner container with a heating element.
This invention relates to an air pressure type electric pot that retains heat and discharges liquid using air pressure.

<Conventional technology> Conventionally, pneumatic electric pots have an inner container made of stainless steel, a heating element of a band heater is stretched around the lower outer periphery of the inner container, and a shoulder is attached to the upper end of the outer case surrounding the inner container. The members are connected, a bottom member is connected to the lower end, a discharge mechanism is provided to discharge the liquid in the inner container into a receiver such as a cup on the outside of the outer case, and an upper lid and a lower lid with a built-in bellows pump are installed at the upper end of the shoulder member. A lid body made of synthetic resin is provided, a central opening communicating with the air exhaust cylinder of the bellows pump is bored in the center of the lower lid, and a predetermined interval is provided around the lower surface of the lower lid away from the central opening. A stainless steel cover plate is provided in which a plurality of bosses are separated and hang down, and is formed in a dish shape to cover the lower surface of the lower cover and has an opening in the center that communicates with the center opening of the lower cover. A sealing pad is provided which is sandwiched from the outside, and a cover plate with this sealing padded is screwed to the boss part of the lower lid, and the lid body is detachably attached to the mouth of the inner container via this cover plate. The liquid in the inner container is heated by a heating element, and the compressed air in the inner container is pumped by the pressure of a bellows pump, and the liquid in the inner container is discharged into a receiver such as a cup by a discharge mechanism. However, in this type of pneumatic electric pot, multiple bosses are installed vertically on the underside of the bottom cover, which creates a large gap between the bottom cover and the top, and gradually increases toward the tip. The lower wall at the outer periphery of the lower cover comes into contact with the outer periphery of the cover plate covered with the seal packing while narrowing the gap, so even if the cover plate is slightly deformed, the lower wall at the outer periphery of the lower cover and the lower cover will be in contact with each other. A gap is created between the outer edge of the cover plate and
The cover plate became unstable and the seal between it and the cover plate that seals the mouth of the inner container was poor, causing air leakage and poor discharge. Further, since the seal gasket is attached by sandwiching the outer peripheral edge of the cover plate from the outside, the structure is complicated and the installation work is difficult.

<Purpose of the invention> The invention has been made in view of the above points, and the object is to provide an electric pot using pneumatic pressure that has a simple structure, is easy to assemble, and has excellent sealing properties and can discharge reliably. .

<Structure of the invention> According to the invention, the lower lid having the boss portion is formed in the shape of a saucer having an outer wall and a bottom wall, and an annular short side wall extending upward is provided at the outer peripheral end of the bottom wall. A flat plate portion extending from the short side wall toward the outer wall is provided, and a small annular rib that restricts the outward expansion of the seal packing is suspended from the lower end of the outer wall, while a flat plate portion extending upward from the outer peripheral wall of the cover plate is provided. In addition, an annular side wall is provided which abuts the short side wall of the lower cover, and an outer flange is integrally molded outward from the upper part of the annular side wall and abuts against the flat plate part of the lower cover. The purpose is achieved simply by providing a contact part that is sandwiched between the flat plate parts of the lid, and an annular tongue that is integrally molded from the outer peripheral end of this contact part, extends downward in a curved manner, and comes into contact with the mouth of the inner container. This is what we are trying to achieve.

<Example of the invention> Hereinafter, an example of the invention will be described based on the drawings.
The electric pot 1 includes an inner container 3 surrounded by an outer case 2, a shoulder member 4 connected to the upper end of the outer case,
A lid body 6 that incorporates a bellows pump 5, a discharge mechanism 7 that discharges the liquid in the inner container, a heating element 8 that heats the liquid in the inner container, and a device that senses the temperature of the liquid in the inner container or the atmospheric air. a temperature regulator 9 that turns the heating element on and off, and a bottom member 1 that covers the bottom inside the inner container.
It is composed of 0.

The inner container 3 is formed into a bottomed cylindrical shape from a metal material such as stainless steel, has a wide mouth at the upper end, and is provided with a flange 11 that expands outward at the tip of the wide mouth.

The inner container 3 has a lower opening for dispensing liquid at the front of the bottom, and a lower pipe 12 formed in a short cylindrical shape made of a metal material such as stainless steel is welded to this lower opening. The flange 11 of the inner container 3 has a packing 13 on the lower surface of the peripheral wall that forms the central opening of the receiving portion of the shoulder member 4, which will be described later.
are closely connected through the The inner container 3 has a central part that is higher than the peripheral edge of the bottom outer wall, and four square-shaped back plate mounting angles are spot-welded to this peripheral edge at a predetermined interval. The lower pipe 12 is also formed at this peripheral end so as not to come into contact with the back plate mounting angle.

The exterior case 2 is made by rolling a thin metal plate, then folding the ends to form a substantially cylindrical shape, and folding the upper end of this cylindrical shape inward into steps.
Curl the bottom edge inward. This cylindrical exterior case 2 has a cutout on the front side, and a transparent plate is fitted into the cutout part, so that a liquid volume display tube of a discharge mechanism 7, which will be described later, can be visually observed through the transparent plate.

The shoulder member 4 includes an annular receiving portion 14 made of a synthetic resin material and having an opening in the center that communicates with the wide mouth of the inner container;
A hinge portion 15 that hinges a lid, which will be described later, at the rear end of this receiving portion, and a beak portion 16 in front of this receiving portion are integrally molded. The receiving part 14 of the shoulder member 4 is attached to the flange part 1 of the inner container 3 via a packing 13 on the peripheral wall forming the central opening.
1 is provided with an annular flange portion 17 that abuts from above.

The beak portion 16 of the shoulder member 4 is once suspended upward from the front of the receiving portion 14, and then hangs downward.
The internal cavity is directed upward and inward from the bottom wall.

The beak portion 16 of the shoulder member 4 has a water heater and a through hole for a heat-retaining pilot lamp at the top and bottom of the center of the front wall. The beak portion 16 of the shoulder member 4 has a locking groove for a locking pawl for locking a locking device of the lid body, which will be described later, on the side of the receiving portion that hangs upward from the front of the receiving portion 14.

The lid body 6 is swingably supported on a hinge portion 15 of the shoulder member 4, and is attached to the upper surface of the shoulder member so as to be openable and closable by a locking device to be described later, and pushes up the bellows pump 5 and the bellows pump. Spring 18 and
The upper lid 21 has a built-in push valve 19 that opens and closes the upper opening of the bellows pump, a pusher 20 that presses the push valve and forces the air inside the bellows pump into the inner container, and a lower lid that covers the lower surface of the upper lid. Lid 2
2, a rubber bush 23 that is fitted into the central opening of the lower lid 22, a cover plate 24 that covers the lower surface of the lower lid, and a locking device 25 that locks the lid 6 to the shoulder member 4.

The upper lid 21 is made of a synthetic resin material and has a size approximately equal to the mouth of the inner container 3, except for the rear portion hinged to the hinge portion 15 of the shoulder member, and has a guide tube penetrating vertically that hangs downward in the center. ing. Top lid 2
1 has a long hole drilled in the center of the front part for sliding the operating knob of the locking device, which will be described later.

The bellows pump 5 is provided with a bellows part, and an air exhaust cylinder part 2 communicating with the bellows part is provided at the center lower end of the bellows part.
6 is provided, and an upper end plate 27 is welded to the upper end of the bellows portion with an opening in the center serving as an air supply port. The outer circumferential wall of the air discharge cylinder 26 of the bellows pump 5 is provided with an annular protrusion into which a rubber bushing, which will be described later, is fitted and locked.

The bushing valve 19 is provided vertically below the upper flat plate part and the lower surface of the flat plate part, and its tip is connected to the bellows pump 5.
A plurality of claws abutting the lower surface of the peripheral wall forming the air supply port of the upper end plate 27 are integrally molded.

The spring 18 has its lower end in contact with the inner surface of the lower end inside the bellows pump 5, and its upper end in contact with the inner side of the claw on the lower surface of the flat plate of the bushing valve 19, thereby constantly inflating the bellows pump.

The pushing body 20 is formed in a cylindrical shape with a flange on the outer periphery of the lower end, and the upper part of the flange is vertically slidable inside the guide cylinder of the upper lid 21, and the flange of this pushing body comes into contact with the lower end of the guide cylinder. It restricts upward jump.

The lower lid 22 is formed of a synthetic resin material in the shape of a saucer and has an outer wall 28 and a bottom wall 29.
Air exhaust cylinder part 2 of bellows pump 5 is placed in the center of 9.
A central opening 30 penetrating vertically and communicating with the central opening 6 is bored, and four boss parts 31, 31 are suspended from the lower circumferential surface remote from the central opening. This lower lid 22 has an annular short side wall 32 extending upward at the outer peripheral end of the bottom wall 29.
A flat plate portion 33 extending from the short side wall 32 toward the outer wall 28 is provided, and this flat plate portion 33
A step is formed between the short side wall 32 and the bottom wall 29 via the short side wall 32.

A small annular rib 34 is suspended from the outer peripheral end of the flat plate portion 33, which corresponds to the outer wall of the flat plate portion 33, to restrict outward expansion of the seal packing described later.

The cover plate 24 is formed in a dish shape to cover along the bottom wall 29 of the lower cover 22, has an opening 35 in the center that communicates with the central opening 30 of the lower cover 22, and has an opening 35 extending upwardly on the outer peripheral wall. An annular side wall 36 is provided and abuts against the short side wall 32 of the lower lid 22, and an outer flange portion 37 is integrally formed extending outward from the upper portion of the annular side wall 36.

A seal packing 38 stretched on the outer peripheral edge of the cover plate 24 has a contact portion 39 sandwiched between the upper surface of the peripheral end of the cover plate 24 and the flat plate portion 33 of the lower lid 22, and an outer periphery of the contact portion 39. An annular tongue piece 40 extending in a curved manner downward from the end and abutting against the flange 11 of the inner container 3 to prevent air inside the inner container 3 from leaking upward is integrally molded. The outer peripheral wall of the abutting portion 39 of the seal packing 38 abuts against the inner wall of the small rib 34 of the lower lid 22.

The rubber bushing 23 is made of an elastic material and has an annular groove bored in its outer wall, and is formed into a cylindrical shape with an F-shaped vertical cross section with a contact portion protruding downward. An inner annular groove into which the annular projection of the cylindrical portion 26 is fitted is bored. The abutting portion of the rubber bush 23 has a length longer than the distance between the central opening of the lower lid 22 and the opening of the cover plate. This rubber bushing 23 is constructed by fitting the peripheral wall forming the central opening 30 of the lower lid 22 into an annular groove in the outer wall, inserting the air exhaust cylinder part of the bellows pump 5 into the inner wall, and then inserting the air exhaust cylinder part 26 into the rubber bush 23. With the annular protrusion fitted into the inner annular groove, screw the screws 41, 41 onto the boss parts 31, 31 of the lower lid 22 from below the cover plate 24, and connect the flat plate part 33 of the lower lid 22 and the cover plate 24. The abutment part 39 of the seal packing 38 is tightly sandwiched between the outer flange part 37 of the bellows pump, and the abutment part of the rubber bushing 23 is tightly abutted against the peripheral wall forming the central opening 35 of the cover plate 24. 5 inside and cover plate 24
It communicates with the opening 35 of.

The lock device 25 includes a lock body having a lock pawl that is engaged in a lock pawl locking groove of a shoulder member, one end of which is in contact with the lock body, and the other end of which passes through a long hole for sliding an operating knob on the top cover. An operating knob, a backing plate that restricts the rearward movement of the lock body, and a spring that constantly pushes the lock pawl of the lock body forward with one end in contact with the back plate and the other end in contact with the lock body. It is made up of

The discharge mechanism 7 includes a pumping pipe 42 that also serves as a liquid level display pipe, and a U-shaped first holder 43 that connects the pumping pipe 42 and the lower pipe 12 of the inner container 3.
, a discharge pipe 44 for discharging the liquid in the inner container to an external receiver, etc., and the discharge pipe 44 and the pumping pipe 4.
2 and an upper valve cylinder 45 forming a valve chamber.
, a lower valve cylinder 46, a valve body 47 in this valve chamber,
It consists of a second holder 48 that connects the lower valve cylinder 46 and the upper end of the water pumping pipe 42. The pumping pipe 42 is formed into a vertically elongated hollow tube made of glass material, and the liquid level in the inner container is displayed at the liquid level indicated in the pumping pipe. It is visible. Discharge pipe 4
4 is installed in the internal hollow of the beak part 16 of the shoulder member 4, and has a rear end communicating with the upper valve cylinder 45, and has a discharge port protruding diagonally forward of the beak part 16. A narrow passage is formed between the outer periphery of the valve body 47 and the lower valve cylinder 46 by ribs in the radial direction, and by supplying air into the inner container, the liquid in the inner container is transferred to the lower pipe 12. , the lower valve cylinder 46 via the first holder 43, the pumping pipe 42, and the second holder 48.
The liquid is fed under pressure, passes through the valve chamber through a narrow passage formed by ribs in the lower valve cylinder 46, and is discharged from the discharge port of the discharge pipe 44. On the other hand, when the electric pot falls over, the valve body 47 moves within the valve chamber and closes the valve chamber side opening of the upper valve cylinder 45, thereby preventing a large amount of liquid in the inner container from leaking from the discharge port. .

The first holder 43 and the second holder 48 are formed into hollow tubes made of heat-resistant and corrosion-resistant elastic material.

The cover body 49 that covers the lower end of the beak 16 of the shoulder member 4 has its front end fitted into the inner wall of the tip of the beak 16 of the shoulder member, and its rear end sandwiched between the front of the outer peripheral end of the shoulder member and the front of the upper end of the outer case. It is held in

The heating element 8 consists of a flat heater, a heat insulating material, and a backing plate.The flat heater is extended to the bottom outer wall of the inner container with an opening in the center, and its terminal is connected to a plug receiver 50, which will be described later. There is. This heating element 8 has a heat insulating material that has approximately the same shape as the flat heater and is stretched on the back side of the flat heater, and further has a heat insulating material that has approximately the same shape as the heat insulating material and is spaced at a predetermined interval on the outer peripheral edge of the heat insulating material on the back side of the flat heater. A back plate with multiple protruding flange pieces is installed, and the flange pieces of this back plate are overlapped with the square-shaped back plate mounting angle of the inner container and fixed with screws to fix the flat heater and heat insulating material. are doing. Of the plurality of back plate mounting angles of the inner container to which the back plate flange pieces are screwed, two opposing back plate mounting angles are used to attach the bottom plate described later at the same time as the back plate flange pieces. The mounting angle for the bottom plate with a Z-shaped longitudinal section is fixed.

The temperature regulator 9 is provided with a holding plate in the central opening of the flat heater, the heat insulating material, and the back plate where they intersect with each other, and a holding plate in the center of the bottom of the inner container so as not to contact the flat heater, the heat insulating material, and the back plate. The terminal is connected to a plug receptacle 50 installed at the rear lower end of the bottom member.

The bottom member 10 includes a ring-shaped bottom ring 51 that contacts the lower end of the outer case 2, and a bottom plate 52 that closes the opening of the bottom ring. The bottom plate 52 is formed in the shape of a disk, and its outer periphery is in contact with the bottom ring 51, and is screwed onto the bottom plate mounting angle of the inner container with a bottom screw.
The inner container and outer case between 1 and the shoulder member are tightened. The bottom ring 51 has a plug receiver 5 at the rear lower end.
0 is fitted.

<Effects of the invention> According to the invention, along the outside of the short side wall of the lower lid,
With the annular side wall of the cover plate in contact, insert the contact part of the seal packing between the outer flange of the cover plate and the flat plate part of the lower cover, and screw it to the boss part with a screw from below the cover plate. Since the cover plate and the lower cover are fixed, the structure is extremely simple and the installation work is easy, and the annular side wall of the cover plate comes into contact with the short side wall of the lower cover, which prevents deformation of the cover plate itself. By restoring the deformation of the cover plate in the vicinity of the seal packing, it is possible to improve the sealing performance of the seal packing and obtain sufficient discharge volume without air leakage. It can be done at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, and FIG. 2 is an exploded longitudinal cross-sectional view showing the main parts of the present invention. 1...Electric pot, 2...Exterior case, 3...
Inner container, 4... Shoulder member, 5... Bellows pump,
6...Lid body, 7...Discharge mechanism, 8...Heating element, 9
... Temperature regulator, 10 ... Bottom member, 11 ... Flange section, 21 ... Upper cover, 22 ... Lower cover, 24 ... Cover plate, 26 ... Air exhaust cylinder section, 28 ... Outer wall,
29... Bottom wall, 30... Center opening, 31, 31...
...Boss part, 32...Short side wall, 33...Flat plate part, 3
4... Small rib, 35... Opening, 36... Annular side wall, 37... Outer flange portion, 38... Seal packing, 39... Contact portion, 40... Annular tongue piece, 4
1,41...bis.

Claims (1)

[Scope of utility model registration request] A heating element is installed at the bottom of the bottomed cylindrical inner container, a shoulder member is connected to the upper end of the outer case surrounding the inner container, a bottom member is connected to the lower end, and the liquid inside the inner container is discharged to the outside. A discharge mechanism is provided at the upper end of the shoulder member, and a lid body consisting of an upper lid and a lower lid with a built-in bellows pump is provided at the upper end of the shoulder member, and a central opening is bored in the center of the lower lid to communicate with the air exhaust cylinder provided at the lower end of the bellows pump. A plurality of bosses hang down at predetermined intervals around the lower surface of the lower lid, while a sealing pad is stretched around the outer peripheral edge to seal the opening of the inner container, and a seal gasket is placed in the center to cover the lower surface of the lower lid. A stainless steel cover plate with an opening is provided, the cover plate is screwed to the boss part of the lower cover, the cover body is removably attached to the inner container via this cover plate, and the inner container is heated by the heating element. In a pneumatic electric pot that heats the liquid inside the pot and pumps compressed air inside the inner container under pressure of a bellows pump, discharging the liquid inside the inner container to the outside, the lower lid has the boss portion. is formed into a saucer shape having an outer wall and a bottom wall, an annular short side wall extending upward is provided at the outer peripheral end of the bottom wall, a flat plate portion extending from the short side wall toward the outer wall, and the outer wall A small annular rib that restricts the outward expansion of the seal packing is suspended from the lower end of the cover plate, and an annular side wall that extends upward and contacts the short side wall of the lower cover is provided on the outer peripheral wall of the cover plate, and this annular side wall An outer flange is integrally molded outward from the upper part and abuts against the flat plate part of the lower cover, and a contact part is sandwiched between the upper peripheral end surface of the cover plate and the flat plate part of the lower cover in the seal packing, and this abutting part. An electric pot using pneumatic pressure, characterized in that an annular tongue piece is integrally formed from the outer peripheral end of the inner container, extends downward in a curved shape, and comes into contact with the mouth of the inner container.